This morning, 2 technicians came to change the light bulbs in the office of the Head of Project Controls using a ladder. However, while deploying the ladder, they did not properly click  the safety device on each side of the ladder blocking the spreaders in position. As a result, as soon as one technician reached the second step, the stepladder fell open on the side. Luckily, no harm was done to the technician. After checking he was OK, I made sure that the locking mechanism for the spreaders was properly actioned  so the light bulb could be safely changed.
Hazard category: Use of tools and equipment